@article{MO_2019_4_a5,
     author = {E. G. Smoljanova},
     title = {Transformation of the branches of a hyperbola into its small fragment},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {58--62},
     year = {2019},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2019_4_a5/}
}